Alumino-silicate or artificial zeolite.



' and do not form colloids or UNITED STATES PATENT oFFioE.

ROBERT GAINS, 0F PANKOWjNEAR BERLIN, GERMANY, ASSIGNOR T0 J. D. RIEDEL.

AKTIENGESELLSGHAFT, OF BERLIN, GERMANY, A CORPORATION OF GERMANY.

for obtaining crystalline zeolites or hydrated alumino-silicates, which are easily permeable elatinous solutions, by adding to the me ts of aluminaminerals with caustic alkalies or alkali-silicates or carbonates a suflicient quantit of silicic acid, to convert the whole of the a kali into alkali silicate. In that case the formation of crystalline zeolites is therefore due to the addition of silicic acid. Recently I have succeeded in obtaining the said crystalline zeolites having a pronouncedinterchanging faculty by substituting for the silicic acid boracie acid, phosphoric acid, nitric acid, sulfuric acid or other inorganic acids or their salts. Eminently suitable for this purpose is boracic acid and its salts.

The composition of the zeolites or hydrated alumino-silicates obtained as described varics according to the roportions of the1 materials used for the prodbction of the me t.

Among the great number of possible compositions of the melt the following two examples may be mentioned 1. The following materials are mixed together, then melted and then extracted with water, viz:

Melted borax 2.4

Sodium carbon- 'ate 6:5:

The composition may be expressed by the parts weight.

formula 3SiO .Al,O .N'aO. 2. A mixture of:

Kaolin" 2.5 parts by weight Melted borax 1.5 Sodium carbon- -ate' 5 aLumno-srmcs'rn on ARTIFICIAL zEoLrrE.

Specification of Letters Patent.

- A lication filed A m 15, 1907. Serial No. 368,366.

Patented March 9, 1909.

- is melted and thereby crystalline zeolites are produced which will easily'interchange their constituents with other components.

If the guantity of inorgamc salt or inorganic aci is roperly adjusted, the residue after the melt as been extracted with water, consists entirely of crystalline alumino-silieates containing water. 7

Instead of an alkali-carbonate; as in the above example, caustic alkali may be employed.

The products obtained by my present process may be-used for the following purposes: 1. For relieving saccharine juices and molasses from the potash and soda mixed with the same and thereby increasing the g uantity of sugar @which crystallizes out. 2. or softening water intended for the generation of steam, or in laundries or dye-Works and other industrial establishments. 3. For removing iron and manganese from water. 4. For removing undesirable bases and salts from water and solutions.

The purification, or the softening, of water may be "effected in a simple manner by filtering the water through alayer of aluminasilieate, containing sodium.

I The chemical reaction may take place for example in the manner indicated by the following equation: I 2SiO,.Al O .Na,O CaII -(COQ Molasses and saccharine juices containing potash are filtered throu h alumino-silicates containing calcium, in w 'ch case the chemical reaction taking place may be expressed for example by the following equation:

What I claim is:

1'. The herein described process for the nate with a sufficient quantity of an inorganic salt, t o insure that on the extraction of the melt with water there remain only crystalline artificial zeolites.

v 2. The herein described rocess for the manufacture of artificial zeohtes in a crystalline form,- which consists in fusing together an alumina-compound and an alkali carbonate with a suflicient quantity of aearbonate an aluminacompound and an alkali carboto insure, that after the extraction of the melt with water, there remain only crystalline artificial zeolites.

3-. The herein described process for the manufacture of artificial zeohtes in a crystalline form, which consists in fusing together an alumina-compound and an alkali carbonate with a suflicient quantit of borax to insure}, that after the extraction of the melt with water there remain only crystalline artificial zeolites.

"'4. Therecess for the manufacture of artificial zeo tee in a crystalline form, which consists in melting together an alumina-comound and an alkali-carbonate with the ad- 'tion of a sufiicient uantity of an inorganic salt, to insure that t e whole of the alkali will combine with the alumina and subsequently extracting the melt with water, substantially as described.

In testimony whereof I have set my hand hereunto in the presence of twp subscribin witnesses.

a I ROBERT GANS.-

Witnesses PAUL SIEDLER, BRUNO FRILING. 

